We study the habitability of the two 1-2 Earth-mass planets, recently detected by the CARMENES collaboration, around the ultra-cool nearby M dwarf Teegarden's Star. With orbital periods of 4.9 and 11.4 days, both planets are likely to be within the Habitable Zone and tidally locked. They are among the most Earth-like exoplanets yet discovered. Applying an analytical habitability model we find that surface liquid water could be present on both planets for a wide range of atmospheric properties, which makes them attractive targets for bio-signature searches. The prospects of the planets retaining such an atmosphere over their history are discussed.
@article{arxiv.1906.07704,
title = {On the Habitability of Teegarden's Star planets},
author = {Amri Wandel and Lev Tal-Or},
journal= {arXiv preprint arXiv:1906.07704},
year = {2019}
}